YS 61 on the pipe...prop? (Full Version)

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e_eves -> YS 61 on the pipe...prop? (10/19/2006 2:06:44 PM)

Hello,

I'm in the process of building an old school Aurora pattern plane, actually the PA2, and will be putting the YS 61 rear exhaust engine on the plane.

I'll be running %15 wildcat fuel and an OS #8 plug. What is the recommended prop for this setup?

Thanks!



MTK -> RE: YS 61 on the pipe...prop? (10/21/2006 1:34:13 AM)

As I recall, we used to run the pipe at around 15 1/2" to the high point from glow plug, straight line, and run a 12x12 to 13x10 APC. Strong and quiet set-up. We used to run KB1L plugs and these would last half a season. Don't remember if anyone had success with #8s

MattK

quote:

ORIGINAL: e_eves

Hello,

I'm in the process of building an old school Aurora pattern plane, actually the PA2, and will be putting the YS 61 rear exhaust engine on the plane.

I'll be running %15 wildcat fuel and an OS #8 plug. What is the recommended prop for this setup?

Thanks!





airbusdrvr -> RE: YS 61 on the pipe...prop? (10/21/2006 2:17:26 AM)

I have a new YS 61 rear exhaust with tuned pipe(header not yet adjusted for best RPM) that has been broken-in. I have a Master Airscrew G/F Series(Black color) 11X8 prop and it turns 12,800 rpm. I had a couple of old timers tell me this was the better diameter/pitch choice. You will be impressed with this engine. My setup has so much power I doubt I will anytime soon go through the header shortening procedure to get max rpm. It will far outfly my skill level for quite sometime.



flywilly -> RE: YS 61 on the pipe...prop? (10/21/2006 7:35:40 PM)

K&B 1L plugs are great! I've used them in rear exhaust .60s since my first OS .61VF in 1980 (and I keep at least 1 .60 sized pattern ship active all the time). Oh yeah, running anywhere from 10% to 25% nitro.
Will B.



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